Why consider this model?
An alternative with automatic water and suction adjustment, plus a mode designed for confined spaces.
This assessment interprets documentation. It does not establish effectiveness on a particular stain, perceived manoeuvrability or appliance lifespan.
What to know before choosing
- The stated weight is 5.2 kg without accessories.
- Clearance under furniture is not documented.
- Stair!Assist is not a measurement of how easy it is to carry.
Documented specifications
Manufacturer documentation for the French-market model, translated into English. Check differences in the UK variant, plug, bundle and warranty before buying.
FCV 4, FCV 3 and SCV 4 Steam Vac are three different models.
Manufacturer figures. Missing information stays unknown; it does not establish that a feature is absent.
| Criterion | Value and conditions |
|---|---|
| Stated weight | 5.2 kg Without accessories, according to Kärcher. Source KARCHER-FCV4-FR |
| Stated maximum runtime | 45 min Manufacturer’s maximum; the table does not specify the exact mode. Source KARCHER-FCV4-FR |
| Clean-water tank | 750 mlSource KARCHER-FCV4-FR |
| Dirty water, upright | 450 mlSource KARCHER-FCV4-FR |
| Charging time | 4 h Stated charging time: 240 minutes. Source KARCHER-FCV4-FR |
| Roller self-cleaning | Yes, statedSource KARCHER-FCV4-FR |
| Dry vacuum mode | Yes, statedSource KARCHER-FCV4-FR |
| Automatic water adjustment | Yes, stated Dynamic!Control mode. Source KARCHER-FCV4-FR |
| Lay-flat body height | Not documented Not established in the selected sources. Source KARCHER-FCV4-FR |
The budget beyond purchase
Real cost depends on the price paid, rollers, filters, detergent and your use. We have neither measured consumption nor a verified annual cost for this model.
Calculate a scenario using your assumptionsPractical answers
Questions about FCV 4
What does Dynamic!Control adjust?
Automatic mode adjusts suction power and water volume to the dirt detected.
Does Stair!Assist mean the appliance is lightweight?
No. The feature changes its behaviour in certain positions; the stated weight remains 5.2 kg without accessories.
Does FCV 4 have a larger clean-water tank than FCV 3?
No. FCV 4 is stated at 750 ml, compared with 800 ml on the FCV 3 specification.
Sources and traceability
- FCV 3, reference 1.056-122.0; specifications and modes — French sourceDocumentary check: 2026-10-31 · Reference KARCHER-FCV3-FR
- FCV 4, reference 1.056-131.0; specifications and modes — French sourceDocumentary check: 2026-10-31 · Reference KARCHER-FCV4-FR
A manual may cover several variants. Check the exact reference and supplied accessories before buying. Report information that needs correcting.